| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to happen to | 206 |
|
| 2 | to happen in | 124 |
|
| 3 | to happen at | 37 |
|
| 4 | to happen on | 20 |
|
| 5 | to happen for | 13 |
|
| 6 | to happen with | 12 |
|
| 7 | to happen after | 8 |
|
| 8 | to happen before | 8 |
|
